4 Comments on “which interface on the instance handles public-facing t…”

1. AWS-Conqueror says:

   July 19, 2017 at 11:44 pm

   C. Secondary network interface
   http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html

   
   
   
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2. Ash says:

   September 2, 2017 at 10:38 am

   C. Secondary ENI eth1 handles the public facing traffic

   
   
   
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3. Steve says:

   October 5, 2017 at 5:04 pm

   You both are wrong. The primary interfae is assigned both the public IP and the private IP for the instance.

   Network interface ID
   eni-580636e6
   Subnet ID
   subnet-ca19d581
   VPC ID
   vpc-ac18eed4
   Availability Zone
   us-east-1a
   MAC address
   0a:de:37:49:82:de
   Description
   Primary network interface
   Security groups
   lab1-public-sg. view inbound rules
   Owner ID
   002889752094
   Status
   in-use
   Primary private IPv4 IP
   10.100.1.123
   Private DNS (IPv4)
   –
   IPv4 Public IP
   34.229.144.145*
   Secondary private IPv4 IPs
   –
   IPv6 IPs
   –
   Source/dest. check
   true
   Attachment ID
   eni-attach-ba761849
   Instance ID
   i-0aff99b81fcb6902b
   Attachment owner
   002889752094
   Device index
   0
   Attachment status
   attached
   Delete on termination
   true
   Owner ID
   amazon
   Allocation ID
   –
   Assocation ID
   –

   
   
   
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4. Harsha says:

   October 9, 2017 at 12:05 pm

   Steve – Check this

   http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html

   You can create a management network using network interfaces. “In this scenario, the secondary network interface on the instance handles public-facing traffic” and the primary network interface handles back-end management traffic and is connected to a separate subnet in your VPC that has more restrictive access controls.

   
   
   
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